Centrifugal casting machine



Nov. 47, 1924.

w. T. JANNEY GENTRIFUGAL CASTING MACHINE 4Filed sept. 9, wmf

i Patented Nov. 4, 1924.

eNirsD STATES PATEN 'i' ori-uca. y

T. JANNEY, 0F PHILADELPHIA,l ZEISTNII'SYLVAINIA..A

cENraIFUGAL cas'rme MACHINE Application -1ed September 9, 1922. Serial No. 587,114.

To all whom t may concern:

Be it known that I, WALTER T. JANNEY, a citizen of theUnited States, residing at Philadelphia, in the county 4of Philadelphia and State of Pennsylvanla, have invented certain .newv and useful Improvements in Centrifugal Casting Machines, of which the following is a specification.

My invention relates to centrifugal casting machines, and is in some of its general aspects, similar to the construction set forth inl my pending application N o. 57 3.019.

An important object in view is to provide a device fof this character with means for reliablyv and yet yieldingly holding the lid and mold in operative engagement with each other during the casting operation, so that the sudden expansion of the mold which inevitably takes place when the mass of molten metal is suddenly poured into it, will not subject the parts to undue strain, and will not, in any way, unfavorably affeet the perfect operation of` the machine.

Another important object is to employ spring pressure for yieldingly holding the lid and mold together, but with the spring so far removed from the mold that the excessive heat from the mold will not reach I the spring and take the temper outof it.

St1ll another object is vto provide a lid. having annular slots for the escape of the excess metal poured into the mold.

Other objects will appear in the subjoined description.

important feature of the invention consists of a revoluble basket havinga lid rigidly held thereon against outward movement; and a mold carried inside the basket; and means including a spring for yieldingly iclding the mold in engagementwith the The invention consists in certain novel features of construction and arrangement of partsas will be hereinafter described and claimed, reference being had to theaccompanying drawings, in which Fig. 1 isa sectional view of my device.

Fig. 2 is a front elevation on a reduced scale of the revoluble basket employed.

Fig. 3 is an elevation, on a re uced scale, of the lid employed with the revoluble basket shown'in ig. 2; and, I,Fi 4 is a perspective view of the do whic holds the lid on the basket.

ttention is called inthe outset tothe fact that centrifugal force has been employed to yieldingly hold the lids on centrlfugal casting machines, which arrangement works very well when the molds are held suiliciently upright to hold thej lids in operative position on them by. ravity till the machinery is speeded up s ciently to make the centrifugal mechanism grip the lids. Butfor the majority of castings the molds should be disposed horizontally in which osition gravity will cause the lids to fall otp the molds before the machine starts revolving unless other means be provided for holding them inoperative position till' the centrifu al mechanism has been caused to revolve Wlth suiiicient rapidity to grip the lids. With my arrangement, no such diliculty can exist, even when centrifugal force is'employed, for in my construction, instead of the lid being held on the mold, the mold is yieldingly held against the lid-is held i`n a casing which serves as a guide for its movements, so that when a horizontal mold is standing still, the mold will have no disposition to move out of engagement with the lid, but even if it did, the fact that the mold has guided movement relatively tothe lid, would cause it to certainly move back into proper engagement therewith, whether pressed by centrifugal force or any other force whatsoever; so that the great advantage of having a stationary lid cooperating with a movable mold becomes quite apparent.

Referring vfurther to the drawings the numeral l indicates a housing havin a. large "centralopening 2r atY its forward enti and at itsi-nner end an integral sleeve 3 into which .is' cast a long bearing 4, which supports a 7 hollow shaft 49, havin at its inner end inside the housing 1, a eavy ange 48, and beyond-the sleeve 3 of the housing, a pulley 58 ri idly held thereon. A basket 41 1s rigidly eld on the flange 48 by -stud bolts 48. The basket 41 carries'the cup 42 which is forced out into direct engagement with the lid 43. The basket 41 h'as pairs of ears 44 which, by means of pivots 45, carry dogs 46`which pass into slots 43 of the lid to hold the lid on theA basket, said dogs being each provided with an integral cross bar 46 at its outer free end, so that said This lid alsc'provided with annular slots 47 similar to rthe slots' 17 (shown ,-in the pending application" referred to) for the escape of excess metal.

I have shown the lid as also provided with an annular inwardly extending 'laiige 43 which engages the`outer end of the cup. 42.

The ho low shaft 449 carries the plunger 50. This plunger is operated in'one direction by 'a sprin 51, and is also operable in both directions y a -hand lever 52 which has an integral upwardly projecting extension 53 at its inner end where it is pivoted to a suitablel support -54. This support. is rigidly connected to the frame 55 of the machine by meansl of the bars 55, and has a segmental rack 54v which isengaged by apa-wl 5 2"- carried on the hand-lever 52.-n The section 53 of the hand lever is bifurcated at its upper end to receive the outer projecting end of the "plunger, which is provided at. its ex-` ftreme outer end with a nut 56 and a washer 57 which forms section 53.

By thel arrangement shown a'downward movement of the lever 52 will withdraw the plunger from enga ement with the moldcar fing cup 42, and t e awl 53" will hold awear plate for said lever f the ever in its downwar position withthe -plunger thus withdrawn, so that the lid can e easily therrlcfrom. u d1 .d

e o erating pu ey 58 is rigi y secure -on .the iaft 49. lThe operation of my device is as follows zplaced on the mold or removed Assumin that the parts are disassembled, i f -with the p unger 50 'forced to ,its farthest position to the rightby the spring 51, the

cup 42 is placed 1n the basket41; then the lid'43 issecured 011l theope'n end of the basket b means of the doffs 46 as already' describe 5 the `hand lever 5:2 is 'elevated to permit thespring ltooperate with its full orce tor pressthe Opel) end of the cup 42 into firm engagement with machine is t en caused to rotate rapidiy by means of a power belt passed around the lnto the 'mold through the opening 59 at' the centre of the lid, which opening is smoothf and-true, andtherefore doesnot bump or jar the tile s out throu h which the metalj isz-poured.. e metal ta'es the form of the mo d, and if there be-'any excess metal it passes out` thro h the annular and is'caught in t e casing 1. Asthe moldl is rapidly'ievolved preparaslots-47,'

tory to pouringthe molten metal,.the airis exhausted from theglold through thenpenings 47 of the lid, 'ch causes a continufous current of air to be suckedfinthrough the central opening 59. But when'the tile spout ls'fenteredv intothis central opening and practicallylls it, the suction o erates von the molten metal in the spout to raw it Athe revolvi the lid 43 the.

,mold to lho ld. .the ,mentf with the 11d. ulley .58; the molten metal is then poured come more quickly and' more evenly dis- .very rapidly into the mold causingvit to be-,n

tributed over the entire innersurface ofI the mold, which is a decided advantage.

The pressure of the KplungerfO against the cup 42 yieldingl presses the cup into firm engagement Wit the lid, so that-how' ever much 'the mold may expan lfrom the heat of the molten metal, or however sudden 'the expansion ma be, the'mold and lid will be yieldin ly hel in firmoperative relation to each o t er by reasonof theresiliency of the spring 51. .When the metal, has een I.poured and becomesolidied, the machine 1s stopped and the spring' pressure imposed l upon the mold 42 through the plunger 50,

is relievedby lowering the hand lever 52,

whichforces the plunger 50` to the right in which position it issecureduby'means o lthe pawl 52"; this in turn relieves the pressure against the lid and permits it to .be

easily removed from the-basketthe castingf and the mold are then removed rom the cup by a palr of expanding tongs, and the casting is jarred loose from the mold, and the parts are ready for the operation to be re cated. a

e ea? and quick removal of the lid provided or in my device, permits the mara id succession.

chine' to be operated, ftime after time, in i 1 .A aving. described my invention, what If protect by Letters engage the forward end of the mold to form an `extension thereof ;A a

the inner en vo t ermold; an a sprin for normally pressing the plunger tow the 2. In a device ef the hartem aseribea and havlng 'ded movement thereon; a lid I (plunger carried by'1 su ort an ada ted to engage'` mold 1n yielding engagef a revolving'support; a moldcarried thereby' l and means orrigidlyjholdinglthe sameon the revolvin 'su ortl said lid nular-inwarl Pp a continuation thereof, saidfcontinuation being of an internal diameter"to register with avingan'an? yextendin'gfiange adapted to engage the forward end lof the mold to form 20 the rest of themold; aplunger. carried by the revolvin su portan normally pressing the mold to hold the 'mold ment with the lid.

lunger tcwar the a revolving sup ort; a nold .carried thereby and havmggui ed,V movement thereon; a. lid

I F l ada ted to engage j the inner en vo the mold; an a sprin forv 1n yielding engage# 3'. In adevice of the vcharacter described,`

and means for rigidly holding the same on the revolving support, said lid having an annular inwardly extending flange adaptedv to engage the forward end of themold; a plunger carried by the revolving support and adapted to engage the inner end of the mold; a spring for normally pressing the plunger toward the mold to hold the mold in yielding engagement with the lid; and manual means for holding the plunger in adjusted positions away from themold against the action of its controlling spring.

4. In a device of the character described, a revolving support; a mold carried thereby and having guided movement thereon; a lid land means for rigidly holding the same on the revolving support, said lid having an annular inwardly extending flange adapted to engage the forward end of the mold to form a continuation thereof; a plunger carried by the revolving support and adapted to engage the inner end of the mold; a spring for normally pressing the plunger toward the mold to hold the mold in yielding engagement with the lid; a manually controlled lever adapted to operate the plunger against the action of its spring, said lever extending rearwardly from the plunger; and a pawl and ratchet cooperating with the lever for holding the plunger in adjusted positions away from the mold against the action of its controlling spring.

In testimony whereof I aliix my signature.

WALTER T. JANNEY. 

